2018 Mercedes-Benz S-Class 2.9L Diesel · KF18 EYY

The vehicle maintains a functional roadworthiness status, though the maintenance trend indicates a reactive approach rather than proactive care. The most recent test on 11 February 2025 at 229,271 miles resulted in a failure due to a nearside rear tyre reaching legal limits and insufficient washer fluid. While the vehicle passed the immediate retest, the recurring nature of these consumable-related failures suggests that the owner only addresses mechanical issues when they threaten to cause an MOT failure. The mileage profile is exceptionally high for an eight-year-old S-Class, averaging over 28,000 miles per annum. Between November 2022 (140,281 miles) and December 2023 (206,407 miles), the car covered 66,126 miles in just 13 months. This rapid accumulation continued with another 22,864 miles recorded between the December 2023 and February 2025 tests. Such heavy motorway use places significant strain on the complex drivetrain, air suspension components, and cooling systems compared to average luxury vehicle usage. A buyer must conduct a thorough physical inspection of the suspension geometry and tyre wear patterns. The record shows consistent edge wear on multiple tyres across 2021 and 2025, which often points to alignment issues or worn control arm bushings that remain undetected. Given the extreme mileage, the integrity of the air suspension bellows and the condition of the shock absorbers are critical. Particular attention should also be paid to the brake discs and calipers for signs of thinning, as the high-mileage cycle accelerates the degradation of these heavy-duty components.